Your browser doesn't support javascript.
loading
Synthesis and Characterization of Functionalized Nanosilica for Zinc Ion Mitigation; Experimental and Computational Investigations.
Ali, Zarshad; Ahmad, Rashid; Farooq, W Aslam; Khan, Aslam; Khan, Adnan Ali; Bibi, Saira; Adalat, Bushra; Almutairi, Mona A; Yaqub, Nafeesah; Atif, Muhammad.
Afiliación
  • Ali Z; Department of Chemistry, Hazara University, Mansehra 21300, Khyber Pakhtunkhwa, Pakistan.
  • Ahmad R; Department of Chemistry, University of Malakand, Chakdara 18800, Dir Lower, Pakistan.
  • Farooq WA; Chemistry Division, PINSTECH, PO Nilore 45650, Islamabad, Pakistan.
  • Khan A; Department of Physics, College of Science, King Saud University, Riyadh 11451, Saudi Arabia.
  • Khan AA; Chemistry Division, PINSTECH, PO Nilore 45650, Islamabad, Pakistan.
  • Bibi S; Department of Chemistry, University of Malakand, Chakdara 18800, Dir Lower, Pakistan.
  • Adalat B; Department of Chemistry, Hazara University, Mansehra 21300, Khyber Pakhtunkhwa, Pakistan.
  • Almutairi MA; Department of Chemistry, Hazara University, Mansehra 21300, Khyber Pakhtunkhwa, Pakistan.
  • Yaqub N; Department of Physics, College of Science, King Saud University, Riyadh 11451, Saudi Arabia.
  • Atif M; Department of Physics, College of Science, King Saud University, Riyadh 11451, Saudi Arabia.
Molecules ; 25(23)2020 Nov 25.
Article en En | MEDLINE | ID: mdl-33255844
Zinc is an essential trace metal and its concentration above 4ppm reduces the aesthetic value of water. This study explores the possibility of using functionalized nanohybrids as Zn(II) ion scavengers from aqueous solution. Functionalized nanohybrids were synthesized by the attachment of thiosemicarbazide to silica. The material was characterized by TGA, SEM, FTIR, EDX, and BET analysis, which revealed ligand bonding to silica. The functionalized silica was employed as Zn(II) ion extractant in batch experiments and removed about 94.5% of the Zn(II) ions at pH 7, near zero point charge (6.5) in 30 min. Kinetics investigations revealed that zinc adsorption follows an intra particle diffusion mechanism and first-order kinetics (K = 0.1020 min-1). The data were fitted to Freundlich, Dubinin-Radushkevich, and Langmuir models and useful ion exchange parameters were determined. The impact of co-existing ions on Zn(II) ion sequestration was also studied and it was found that the adsorbent can be used for selective removal of zinc with various ions in the matrix. Quantum mechanical investigations revealed that the Zn(II) ion adsorption on ZnBS1 is more favorable, having higher binding energy (BE) (-178.1 kcal/mol) and ∆H (-169.8), and making tridentate complex with the N and S sites of the chelating ligand. The negative ∆G and BE values suggest highly spontaneous Zn(II) adsorption on the modified silica even at low temperatures.
Asunto(s)
Palabras clave

Texto completo: 1 Banco de datos: MEDLINE Asunto principal: Zinc / Dióxido de Silicio / Nanopartículas / Iones Idioma: En Revista: Molecules Asunto de la revista: BIOLOGIA Año: 2020 Tipo del documento: Article País de afiliación: Pakistán

Texto completo: 1 Banco de datos: MEDLINE Asunto principal: Zinc / Dióxido de Silicio / Nanopartículas / Iones Idioma: En Revista: Molecules Asunto de la revista: BIOLOGIA Año: 2020 Tipo del documento: Article País de afiliación: Pakistán